In the land of Equestria, there was an epic legend of Guardian Wolves who fought in a Legendary War and freed all of Equestria from the evil Dark Lord Bloodfang and his Nightwalker Army. But because Twilight Sparkle didn't believe in the story, it caused her to accidentally free Bloodfang and started an invasion to destroy all of Equestria. Twilight and her friends must begin their most difficult journey and travel to the land of Imperiacus to seek help from the wolves and bring them back to save their home once again.

When a pirate named Captain Jack Silver steals the Elements of Harmony and kidnaps the Cutie Mark Crusaders, it's up to Twilight and the rest of the Mane Six who now must take to the high seas in order to get them back. When the Mane Six finally find them, they all soon find themselves joining Jack and his crew on a swashbuckling adventure filled with challenging spirits, terrible storms and demonic pirates, all of which act as obstacles that stand in their way of finding the SEVENTH Element of Harmony.